EUVD-2026-21220
GHSA-2jvp-h4w4-2vxh
CVSS VectorNVD
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3DescriptionNVD
Integer underflow in wolfSSL packet sniffer <= 5.9.0 allows an attacker to cause a program crash in the AEAD decryption path by injecting a TLS record shorter than the explicit IV plus authentication tag into traffic inspected by ssl_DecodePacket. The underflow wraps a 16-bit length to a large value that is passed to AEAD decryption routines, causing a large out-of-bounds read and crash. An unauthenticated attacker can trigger this remotely via malformed TLS Application Data records.
AnalysisAI
Integer underflow in wolfSSL's packet sniffer (versions up to 5.9.0) allows remote attackers to crash applications during AEAD decryption by sending malformed TLS Application Data records with insufficient length for the explicit IV and authentication tag. The vulnerability wraps a 16-bit length value to an unexpectedly large integer, triggering an out-of-bounds read in decryption routines. …
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External POC / Exploit Code
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